Patent US3365381A successfully refreshed from Google Patents.
US3365381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical machining including in-process guaging of the workpiece
Assignee: Westinghouse Electric Corp
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Filing: 1965-02-23
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Granted: 1968-01-23
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Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Robert E Fromson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:27
CPC Classifications
B; B23; B23H; B23H3/00; B23H3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN THE ELECTROLYTIC PROCESS OF REMOVING MATERIAL FROM A WORKPIECE BY MEANS OF AN ELECTRODE HAVING A CONDUCTIVE WORKING FACE, THE METHOD COMPRISING, IMPRESSING AN ELECTRIC CURRENT ACROSS SAID ELECTRODE AND SAID WORKPIECE PREDOMINATLY ANODIC, PUMPING A LIQUID ELECTROLYTE TO A PROVIDED GAP BETWEEN SAID WORKING FACE AND SAID WORKPIECE, APPLYING A FORCE BETWEEN THE ELECTRODE AND THE WORKPIECE IN A DIRECTION TO DECREASE SAID GAP, SENSING THE PRESSURE OF SAID ELECTROLYTE RELATIVE TO SAID GAP TO PROVIDE A FIRST CONTROL SIGNAL IN ACCORDANCE WITH THE ACTUAL PRESSURE OF SAID ELECTROLYTE RELATIVE TO SAID GAP, PROVIDING A SECOND CONTROL SIGNAL IN ACCORDANCE WITH A DESIRED PRESSURE OF SAID ELECTROLYTE RELATIVE TO SAID GAP, AND CONTROLLING SAID FORCE IN ACCORDANCE WITH THE DIFFERENCE BETWEEN THE FIRST CONTROL SIGNAL AND THE SECOND CONTROL SIGNAL.
Claim 2
Dependent Claim
132 words
IN THE ELECTROLYTIC PROCESS OF REMOVING MATERIAL FROM A WORKPIECE BY MEANS OF AN ELECTRODE HAVING A CONDUCTIVE WORKING FACE, THE METHOD COMPRISING, IMPRESSING AN ELECTRIC CURRENT ACROSS SAID ELECTRODE AND SAID WORKPIECE PREDOMINATLY ANODIC, PUMPING A LIQUID ELECTROLYTE TO A PROVIDED GAP BETWEEN SAID WORKING FACE AND SAID WORKPIECE, APPLYING A FORCE BETWEEN THE ELECTRODE AND THE WORKPIECE IN A DIRECTION TO DECREASE SAID GAP, SENSING THE PRESSURE OF SAID ELECTROLYTE RELATIVE TO SAID GAP TO PROVIDE A FIRST CONTROL SIGNAL IN ACCORDANCE WITH THE ACTUAL PRESSURE OF SAID ELECTROLYTE RELATIVE TO SAID GAP, PROVIDING A SECOND CONTROL SIGNAL IN ACCORDANCE WITH A DESIRED PRESSURE OF SAID ELECTROLYTE RELATIVE TO SAID GAP, AND CONTROLLING SAID FORCE IN ACCORDANCE WITH THE DIFFERENCE BETWEEN THE FIRST CONTROL SIGNAL AND THE SECOND CONTROL SIGNAL.
References Cited (Backward Citations)
US3058895A
Cited
US3002907A
Cited
FR1290734A
Cited
US3287245A
Cited
US3121054A
Cited
US3336215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |